The linga of light . There are believed to be 12 such lingas, the first to have appeared on earth, although their location is not consistently identified. Shiva is supposed to have first manifested himself as a jyotirlinga (lingodbhava) on the night of the Arudra nakshatra .The jyotirlingas look like any other linga. However, it is believed that a person who has attained a certain degree of spirituality sees these lingas as columns of fire piercing through the earth. There are six definitely agreed-upon jyotirlingas: Kedar in the Himalayas; Bhimashankara at Dakini (Maharashtra); Tryambak on the banks of the River Gautami in Nasik (Maharashtra); Somnath at Saurashtra (Gujarat); Mahakala at Ujjain (Madhya Pradesh); Rameshvara at Setubandhana (Tamil Nadu). The other six commonly accepted jyotirlingas are: Vishvanath at Varanasi (Uttar Pradesh); Amareshvara at Omkara; Vaidyanath at Parali (Maharashtra); Nagesh at Darukavan (Maharashtra); Ghushmesh at Shivalaya near Ellora (Maharashtra); Mallikarjuna at Srisailam (Andhra Pradesh).